Abstract
On Oct ober 10, 22:54 UTC, a significant earthquake (Mw 6.8 GCMT) occurred SW of Zakynthos Island. A thrust -fault foreshock (Mw 4.8 NOA) preceded the event by 32 minutes.
Moment tensors of mainshock, reported to EMSC by several agencies , featured a sign ificant va riability and large non -DC components. We study possible source complexity with the goal to provide a n explanation of the apparently non- shear fault motion.
In particular, we investigate possible superposition of mainshock from dom inant strike -slip rupture with thrust - faulting, as both can co- exist in regional stress field , and m ay provide a piece of information about complex tectonic structure of the region.